Don't know what to tell you on that one. It's not the board I have, which is pictured below and comes directly from Analog Devices. The one you linked me to appears to be an aftermarket affair of some sort, and may be every bit as good as 'the real thing,' but I can't vouch for it.
The A/D (Analog Devices) approach is a two-board one. The one that goes to your USB port is the small guy, which connects with the ADAU1701 board with a JTAG connector over the 10-pin ribbon cable. This same small board can plug into the mother board on the products we have Sigma chips on, so you can run from the Sigma program directly instead of having to compile code. This comes in handy when you want to change parameters temporarily just to see how it sounds. Once the Sigma schematic is updated, then another guy turns it into code and blasts it into memory to load at boot.
The other A/D board has a pot, a Class D output amp and some other bells and whistles I've never used. The ADAU1701 is a remarkable chip; we have several professional products using it as the main go-to processing part. This product:http://inovonicsbroadcast.com/product/223
uses just one ADAU1701 and a PIC to do everything. I kept expecting to run out of headroom, but even with all the functions going on here, it's still under 70% of capacity.
The Sigma interface can be a bit cantankerous. I started with Sigma under Windows XP, with most of my designs done under Vista and Win7. I asked our programmer for a recommendation for a new computer, as my old Asus 'mini' was very slow, what with all the MS updates. He picked out a Dell with Win10 that he thought was best for the purpose. Bottom line: it does not like Sigma, and the USB interface crashed whenever you went into the program to change a frequency, gain or whatever. So I continue to run Sigma on the old Asus, which I "upgraded" to Win10, and the Dell is now on my desk in the office that I'm using right now. The old Asus is slow but it works fine. So evidently there are some computers that just don't like the Sigma interface, the A/D one anyway.
There's an active and helpful A/D forum/group for Sigma, and they've bailed me out of more than one problem. No help with that Dell+USB issue, but when you're selling hundreds of thousands of dollars of a product, a $600 dollar computer just can't become an impediment, nor can it justify a shortcult to an alternative development platform, which may, or may not, mesh well with the forum/support group.